| 摘要 |
<p>1,168,100. Electrically heated rollers. ONDERZOEKINGSINSTITUUT RESEARCH N.V. 28 April, 1967 [30 April, 1966], No. 19691/67. Heading F2V. [Also in Divisions D1 and H5] A heated roller shell 1, 62, is inductively heated upon the setting up of a rotating magnetic field which " cuts " electrically conductive members, such as copper or aluminium rods 12, 13 or 57, in thermal contact with the shell, whereby the induced currents are forced to flow in a particular direction. Rods 12, 13 are interconnected by short-circuiting rings 14, 15. Current intensity is measured inductively by a coil 24 and is used to automatically control the shell temperature. Shell 1 is a tube of steel, or mutually insulated laminations, and is supported by discs 2, 3, and driven by a shaft 4. A stator 18 with three-phase winding 19, 20, and axially extending cooling channels 22, 23, forms the inducing part. Rods 12, 13 are positioned in axially extending grooves in the inner surface of shell 1. The heated roller is used for the warm drawing of synthetic threads (see Division D1).</p> |
